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Logarit20182019
2 năm trước
Bài 6 Cho hai tập hợp : A = {a, b} ; B = {b, x, y}. Điền kí hiệu thích hợp vào chỗ chấm : ( ∈ hoặc ∉ ) x … A ; y … B ; b … A ; b … B. Bài 7. Gọi A là tập hợp các số tự nhiên chẵn m sao cho 4 < m < 11 Hãy minh họa tập hợp A bằng hình vẽ.
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